Flange production process is divided into forging and casting.
Casting out of the flange, rough shape size, processing capacity is small, low cost, but there are casting defects (pores. Cracks. Inclusion); casting internal organization streamlined poor (if the cutting parts, streamlined)
Forging flange generally lower than the casting flange carbon is not easy to rust, forging flow line is good, the organization is more compact, mechanical performance is better than casting flange; forging process improper also large or uneven grain, hardening crack phenomenon, forging costs Higher than the casting flange. Forging is able to withstand higher shear and tensile forces than castings. The advantages of casting is that it can make more complex shape, the cost is relatively low; forging the advantages of internal organization is uniform, there is no castings in the pores, inclusions and other harmful defects; from the production process distinction between casting flange and forging flange, For example, centrifugal flange is a kind of cast flange. Centrifugal flange is a precision casting method to produce flange, the kind of casting more common sand casting organization is much thinner, improve the quality of many, less prone to tissue loose, stomata, trachoma and other issues.
Forging flange production process:
Forging process is generally composed of the following processes, namely the selection of high quality billet cutting, heating, forming, forging after cooling. Forging process methods are free forging, forging and fetal membrane forging. Production, according to the size of the quality of forging, the number of production batch selection of different forging method.
Free forging productivity is low, the processing margin is large, but the tool is simple, versatile, it is widely used for forging shape is simple single, small batch production forging. Free forging equipment with air hammer, steam - air hammer and hydraulic press, respectively, suitable for small, medium and large forging production. Die forging productivity, simple operation, easy to achieve mechanization and automation. Forging forging the size of high precision, small machining allowance, forging the fiber structure distribution is more reasonable, can further improve the service life of parts.